Decorative display base



FIG. 1 is a perspective view showing the new design for a decorative display base;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a perspective view thereof showing the decorative display base with a decorative display;

FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 2; and,

FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 2.

The portions of the decorative display base in FIGS. 1-7 shown in broken lines are included to show features that form no part of the claimed design. 

CLAIM The ornamental design for a decorative display base, as shown and described. 